51913318603 has 2 divisors, whose sum is σ = 51913318604. Its totient is φ = 51913318602.

The previous prime is 51913318577. The next prime is 51913318609. The reversal of 51913318603 is 30681331915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51913318603 - 2¹⁷ = 51913187531 is a prime.

It is not a weakly prime, because it can be changed into another prime (51913318609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25956659301 + 25956659302.

It is an arithmetic number, because the mean of its divisors is an integer number (25956659302).

Almost surely, 2^51913318603 is an apocalyptic number.

51913318603 is a deficient number, since it is larger than the sum of its proper divisors (1).

51913318603 is an equidigital number, since it uses as much as digits as its factorization.

51913318603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 51913318603 in words is "fifty-one billion, nine hundred thirteen million, three hundred eighteen thousand, six hundred three".